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A186840 T(n,k)=Number of (n+2)X(k+2) binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards. 10

%I #8 Jan 27 2013 02:22:23

%S 512,2688,2688,14112,19904,14112,74088,147428,147428,74088,324576,

%T 1075071,1537476,1075071,324576,1421952,6019798,15478835,15478835,

%U 6019798,1421952,6229504,33731024,111211414,209888936,111211414,33731024

%N T(n,k)=Number of (n+2)X(k+2) binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

%C Table starts

%C .......512........2688........14112.........74088........324576.......1421952

%C ......2688.......19904.......147428.......1075071.......6019798......33731024

%C .....14112......147428......1537476......15478835.....111211414.....798816802

%C .....74088.....1075071.....15478835.....209888936....1919555447...17494747887

%C ....324576.....6019798....111211414....1919555447...21242244160..235234097572

%C ...1421952....33731024....798816802...17494747887..235234097572.3176962520030

%C ...6229504...188814612...5699887192..156721188699.2571152951156

%C ..24748736...897952936..32614678623.1078797163411

%C ..98322424..4272342678.186554693948

%C .390617891.20338694068

%H R. H. Hardin, <a href="/A186840/b186840.txt">Table of n, a(n) for n = 1..71</a>

%e Some solutions for 5X4

%e ..0..1..0..1....0..0..1..1....0..1..1..0....0..0..0..0....0..0..0..0

%e ..1..1..0..1....0..1..0..1....0..1..0..0....0..1..1..0....0..0..0..1

%e ..0..1..0..0....0..1..1..0....0..0..0..1....1..0..1..1....0..1..0..1

%e ..0..1..1..0....1..1..1..1....1..1..1..1....0..0..1..1....1..0..1..1

%e ..1..1..0..1....1..1..0..1....1..0..1..1....1..0..1..1....0..0..0..1

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Feb 27 2011

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Last modified April 24 18:03 EDT 2024. Contains 371962 sequences. (Running on oeis4.)